Most people haven't heard of QNX Software, though they've likely come in contact with it. The real-time operating system is used where software failure can lead to catastrophic consequences, even death - from high-speed trains to air traffic control towers to highway toll systems. It's also used in more than 100 different types of cars on the road.

As amazing as this seems, it is entirely feasible to have elevators with absolutely no computer hardware or software involved: most elevators you use have zero computer hardware involved, in fact. It is very simple (comparatively speaking) to build decent elevators that are very reliable with zero computer stuff, as there's many ways it can be done with simpler electromechanical hardware.

So, if you maintain "Wouldn't get on an elevator with anything else." I hope you live in a place where you can easily take stairs up and down to whatever floors you need